Will windows make your Mac slow?
I just bought a MacBook Pro 2017, 258GB and 2.3 proces. I want to make music, but the DAW is only available on windows. If I use Bootcamp, will my MacBook become slower? And do I have enough space with 258GB?
How much RAM is a far bigger issue. MacOS itself requires "More that 4GB" to be reasonably responsive, and running Windows with it in the same "too small" RAM will not improve anything.
If RAM is too tight, you could boot alternately into MacOS OR Windows, and not try to run both at once.